Fluid motor



H. T. ROGERS 2,321,423

FLUID MOTOR Filed March 11, 1940 June 8, 1943.

Patented June 8, 1943 UNITED STATESHPATENT OFFICE 2,321,423 FLUID MOTOR Henry '1. Rogers, Athol, Mass. Application March 11, 1940, Serial No. 323,309 1 Claim. (Cl. 121-164) This invention relates to fluid pressure operated motors and the object of the invention is to provide an improved motor of this class of simple and efficient construction which can be operated by water pressure such as is available in the water service system of a building.

To this end I have provided animproved motor of the class described which, in its best form, may be constructed and operate as set iorth in the following description, the several novel features of the invention being separately pointed out and defined in the claim at the close of said description.

The accompanying drawing is a central vertical sectional view of a motor constructed in accordance with this invention.

The illustrated embodiment of my invention comprise a casing B whose interior is divided by a diaphragm piston 23 into an upper pump chamber 24 and a lower motor chamber 25, and a port II is provided which communicates with the upper pump chamber 24 so as to serve as an inlet and as an outlet for the latter. A spring 26 bears at its lower end against the top of a disk 2! that is fastened at its middle to diaphragm 23 by a screw 28. At its upper end spring 26 bears against an adjustable abutment screw 29.

To the head of screw 28 is pivotally connected, at 30, a pendant lever 31 carrying a roll 32 which is yieldingly pressed against another roll 33 by a spring 34 disposed between the lower end of the lever 3| and an abutment on the base section 35 of the pump casing.

Roll 33 is mounted at one end of a lever 36 whose opposite end occupies a socket3l provided at the upper end of a valve 38. Lever 36 is pivotally supported intermediate its opposite ends on section 35 of the pump casing as shown at 39.

The valve 38 controls an outlet 40 provided through the bottom of section 35 and an off-take passes dead-center relationship with respect to roll 33 and pivot 33 whereupon the pressure of 7 spring 34 will act through rolls Hand 33 and i from conduit I 0 into pipe 4| connects this outlet with the drain pipe of the building.

A conduit 44 connects chamber 25 with a source of supply of water under head or pressure and this source may be one of the pipes of the water service of the building within which the pump is arranged. The delivery end of conduit 44 is constricted as at 35 so that it is of substantially less capacity than the outlet 40.

With the parts occupying the positions shown the valve 38 has just been closed and a the water enters chamber 25 from conduit 44 diaphragm piston 23 is moved upwardly carrying the lever 3| and roll 32 with it. These parts will continue to move upwardly until the roll 32 lever 38 to'abruptly lift valve against an abutment 41. This opens outlet 40 and thereby not only stops further upward movement of the diaphragm but also starts movement of the diaphragm downwardly under the influence of spring 28.

When, during the downward movement of the diaphragm, the roll 32 passes dead-center relationship with respect to roll 33 and pivot 39 the spring 36 acts through lever 3|, roll 32, roll 33 and lever 36 to abruptly restore valve 38 to its closed position again whereupon upward movement of the diaphragm is again started and the operation is repeated.

During the upward movement of diaphragm 23 a check-valve 33 in a fluid-supplying conduit 38 into position l0 closes and part of the contents of chamber 24 is forced upwardly past a check-valve 49 off-take or delivery pipe or conduit l2.

Duringthe downward movement of diaphragm 23 check-valve 39 closes and fluid is drawn into pump chamber 23 from the pipe or conduit ill past check-valve 48. In this way the pump continues to operate automatically to pump fluid conduit l2 so long as fluid under pressure is supplied through conduit M.

The diaphragm 23.may be made from leather or any other suitably flexible and/or elastic sheet material and its outer marginal portion occupies a position between flanges provided upon the two sections 35 and BI of the pump casing, said flanges being fastened together and against opposite sides of the diaphragm by means of bolts.

The disk 21 and diaphragm 23 constitute a piston which is moved up and down alternatively by the pressure of water within chamber 25 and by spring 28.

in an The lower section 35 of the pump casing may 3 be made with a port 50 normally closed by a plug a diaphragm piston motor chamber oi substantially greater capacity than said continuously open conduit: a valve within said motor chamber for controlling said outlet, and means within said motor chamber through which said piston acts to open said valve abruptly when said piston reaches the limit of its movement under the influence oi the fluid pressure, and through which said piston acts to close said valve abruptly when said piston reaches the limit of its movement under the influence 01. said spring, said last-mentioned means comprising a lever pivotally supported at its one end by said diaphragm piston and extending perpendicq ularly from the latter; a second levenpivotally supported intermediate its ends on said casing 5 and disposed approximately at right angles to' said first-mentioned lever. one end of said second lever being co-operatively associated with said valve and the opposite end thereof being cooperativeiy associated with said first-mentioned lever, and a second spring yieldingly urging said first-mentioned lever laterally against said second lever so as to rock the latter on its pivot to cause said second lever to operate said valve when said first-mentioned lever is moved endwise back and forth with said piston, and said first-mentioned lever being provided with a roll through which it acts upon said second lever.

HENRY T. ROGERS. 

